Has anyone used the refillable water brushes? I'm wondering especially the fine point one? I have some small figures that I made from some molds I made with Amazing Putty and want something I can do the real fine details with. Do you like any particular brand best?

I have a refillable water brush that I use just for moistening things.
I have had the refillable markers that I never figured out how to use.
I could never get anything to come out the tip.

I never thought to paint with the water brush pen thing.